Fix swapchain mutable tests buffer allocations

Fix swapchain mutable tests buffer allocations

We're seeing failure on our implementation and those seem to be
related to the fact that some buffers are allocated with one VkDevice
and used with another VkDevice. This raises errors in the validation
layers :

   Validation(ERROR): msg_code: 385926663:
   [ VUID-vkBindBufferMemory-memory-parent ] Object: 0x6 (Type = 8) |
   Object 0x6 was not created, allocated or retrieved from the correct
   device. The spec valid usage text states 'memory must have been
   created, allocated, or retrieved from device'

Affects: dEQP-VK.image.swapchain_mutable.*

Change-Id: I4d3c62dace2d259061382d3014deb05bc4eac9d7